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A G. DONNELLY. TYPE WRITING MAOHINE. No. 363,452. Patented May 24, 1887.

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UNITED STATES PATENT OFFICE.

ALEX e. DONNELLY, on NEW YORK, N. Y.

TYPE-WRITING MACHINE.

SPECIFICATION forming part of Letters Patent No. 363,452, dated May 24, 1887. Application filed January 25, 1886. Renewed September .22, 1886. Serial No. 214,270. (No model.)

To all whom it may concern.-

Be it known that I, ALEX G. DONNELLY, of New York, in the county of New York and State of New York, have invented a new and useful Improvement in Type-\Vriting Machines, of which the following, taken in connection with the accompanying drawings, is a specification.

My present invention relates to the papercarrying roll of a type-writing machine and" the means for securing the paper thereon and feeding the same; and it eonsistsin certain novel features of construction, arrangement, and combination of parts, which will be readily understood by reference to the description of the drawings and to the claims to be hereinafter given. I

Figure 1 of the drawings is a plan of a papercarrying roll embodying my invention. Fig. 2 is an end elevation of the same. Fig. 3 is a sectional elevation,the cutting-plane being on line 90 at on Fig. 1, looking toward the righthand of said Fig. 1; and Fig. 4 is a vertical section on line 7 3 on Fig. 1, looking toward the left-hand of said Fig. 1.

In the drawings, A is the paper-carrying roll secured upon a shaft which extends beyond its ends,and is mounted in bearings in the end pieces or upright portions, B, of the carriage B,and provided at each end with a milled head or button, a, secured firmly thereon out side of the bearings B, as described in another application of even date herewith. The shaft of said roll also has firmly secured thereon,between each end of the roll and a bearing, B, a ratchet-wheel, b, and between said ratchet wheel and the end of said roll has loosely fitted thereon asleeve attached to one end of a short rod, the opposite end of which has its bearing in the rear end ofthe slotted arm 0, which embraces said sleeve and rod, and has secured to its opposite end the bar 0, which extends the whole length of said roll, or from one of i the arms 0 to the other, and is forced against the periphery of the roll A, or asheet of paper placed thereon,by the tension of spiral springs coiled about the said rods in the same manner as described in my other application before cited.

Each arm 0 is provided with the pawl-like tooth or lug e, constructed and arranged to engage with the teeth of the ratchetwheel b, and alsov has secured thereto the arm f, extending therefrom into a position to engage with the stops r and g, on the front edge of the bearingupright 13, to limit the movement of the bar 0 in either direction, in substantially the same manner as described in said other application of even date herewith. cation the roll and paper were prevented from moving backward when the clamping-bar was retracted from contact therewith,wl1ile being moved backward to engage with another tooth of the ratchet-wheel, byh'Xed springs, against the tension of which the roll and paper moved when being fed.

In my present invention I dispense with said In said other applifixed springs, and in lieu thereof I mount another pair of slotted arms, D, embraci ug sleeves h, rods h, and springs in, and provided with pawl-lugs i, to engage with the ratchet-wheels b b, and carrying the clamping-bar D, all constructed and operating in the same manner as the same parts connected with the bar 0, ex-

cept that the arms D are prevented from being moved about the axis of the roll by the pinsjj, set in the bearing-uprights B, one upon each side of the slotted ends of each arm D, as shown in Fl 4.

The operation of my invention is as follows: The parts being in the position shown in the drawings, in order toplaee the paper upon the roll the bar 0 is moved upward until the arms f come in contact with the stops {1, when the tooth of the ratchet-wheel, upon which the pawl-lug tis shown as resting in Figs. 2 and 3, will have passed from under said lug and the tension of the springs it will have caused the bar D to be forced into contact with the periphery of the roll Aand the pawl-lug i, to assume a position to prevent a backward motion of the ratchetwheel and the roll A when the bar 0 is deg and the bar 0 is made to press hard upon the paper and clamp it to the roll. If now the bar 0 is raised, causing the roll Ato be moved about its axis until'the bar D is moved away from contact with the roll by-the teeth of the ratchet-wheels b b, acting upon the pawl-lugs i 'L, the edge of the paper may be readily inserted between the bar D and the roll, when the upward movement of the bar 0 is completed, and the bar D is brought into contact with the paper to clamp it to theroll, and the bar 0 is again moved downward until the arms f come in contact with the stops 9, when it is ready for printing. To feed the paper toa position for printing a new line after a line has been completed, it is only necessary to raise the bar 0 and depress it again. The advantage of this arrangement is that the paper is always clamped to the roll along its whole length by one of the two bars 0 or D, and, consequently, is not so liable todisplaeement or imperfect spacing of the lines as when the paper during a portion of the time is clamped only at two points by springs.

What I claim as, new and desire to secure by Letters Patent of the United States, is

1. In combination with the paper-carrying roll of a type-writing machine, two springpressed clamping-bars, one constructed and arranged to be moved both radially and circumferentially of said roll, and the other constructed and arranged to be moved only radially, substantially as and for the purposes described.

ALEX G. DoNnnLLY.

Witnesses:

N. G. LOMBARD. WALTER E. LOMBARD. 

